Update the wscript to work with waf-1.8.8.  Based on:
http://cgit.freedesktop.org/pycairo/commit/?id=c57cd129407c904f8c2f752a59d0183df7b01a5e


--- pycairo-1.10.0.orig/wscript	2011-04-18 15:42:29.000000000 +0800
+++ pycairo-1.10.0/wscript	2015-04-20 13:01:45.383756898 +0800
@@ -13,18 +13,18 @@
 
 def options(ctx):
   print('  %s/options()' %d)
-  ctx.tool_options('gnu_dirs')
-  ctx.tool_options('compiler_cc')
-  ctx.tool_options('python') # options for disabling pyc or pyo compilation
+  ctx.load('gnu_dirs')
+  ctx.load('compiler_c')
+  ctx.load('python') # options for disabling pyc or pyo compilation
 
 
 def configure(ctx):
   print('  %s/configure()' %d)
 
   env = ctx.env
-  ctx.check_tool('gnu_dirs')
-  ctx.check_tool('compiler_cc')
-  ctx.check_tool('python')
+  ctx.load('gnu_dirs')
+  ctx.load('compiler_c')
+  ctx.load('python')
   ctx.check_python_version((3,1,0))
   ctx.check_python_headers()
   ctx.check_cfg(package='cairo', atleast_version=cairo_version_required,
able>
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<div class='path'>path: <a href='/guix/log/?id=213570dbd3ae919a629337562aebacec9f2fdd3a'>root</a>/<a href='/guix/log/tests?id=213570dbd3ae919a629337562aebacec9f2fdd3a'>tests</a>/<a href='/guix/log/tests/ipfs.scm?id=213570dbd3ae919a629337562aebacec9f2fdd3a'>ipfs.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/ipfs.scm?id=213570dbd3ae919a629337562aebacec9f2fdd3a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-04-12 18:42:22 +0200'>2021-04-12</span></td><td><a href='/guix/commit/tests/ipfs.scm?id=b18f45c21f5d697d384a7bd5c9d3ee314bba9e35'>Add (guix ipfs).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>